Windows 7: Windows 7 Disk Boot Failure

Hi,

I am running Windows 7 32 Bit Home Premium, and at random times the PC will shut down and come up with the BSOD. After I try to boot up the computer I get a message saying 'Disk Boot Failure Insert system disk and press enter. Most of the time the only way I can get it to boot up is if I open up the case and disconnect the hard disk and dvd drive and reconnect them. On the initial screen after pressing the power button, it'll take a while before it detects IDE drives. If I don't disconnect/reconnect them, then at the initial screen it will sit at that screen and will not detect any disk/dvd drive.

Does anybody know a proper solution without having to disconnect and reconnect the hard disk/dvd drive as I think that this may not be a good idea? Any help would be appreciated. Thanks in advance.



*Other notes
- I have 4gb of ram (3.21 usable) and 10 mins after booting up, my PC will be using 1.20gb of ram and I have only opened the web browser.

http://www.sevenforums.com/crashes-d...tructions.html
? IDE drives that must be a few years old, have you run any hardware tests ?
Hard Drive Diagnostic Procedure
RAM - Test with Memtest86+